Congenital myotonic dystrophy (CDM)
Congenital myotonic dystrophy (CDM) is a form of Myotonic dystrophy Type 1 (DM1) in which symptoms are present at birth. Congenital means “present from birth.”
About congenital myotonic dystrophy (CDM)
Congenital myotonic dystrophy (CDM) presents with symptoms very early in life and often requires immediate medical attention. Babies with CDM often have low muscle tone and may have difficulty breathing or feeding on their own. Because symptoms begin so early, infants with CDM often need specialized medical care right away. CDM is the most severe form of DM1 and is almost always inherited from a mother who has DM1.
As children grow, symptoms and needs can change. Some challenges may improve over time, while others may require ongoing medical, educational, and supportive care.
- Symptoms are present before birth or at birth
- Reduced fetal movement may be noted during pregnancy
- Newborns often show symptoms immediately after delivery
- Motor delays are evident in infancy, with gradual improvement in early childhood
- Muscle weakness is often obvious from birth.
- Breathing and feeding challenges from birth.
- Learning and developmental hurdles.
Videos about CDM from the Digital Academy
Ask-the-Expert: Pediatric endocrinology & myotonic dystrophy
Published: October 10, 2025
Empowering Adult Children: Managing Care, Service Delivery, and Living with CDM ...
Published: August 28, 2025
Adulthood Ahead: Essential Planning for Parents of Children with CDM - 2025 MDF ...
Published: August 28, 2025
